How do i get my ipod to work on my Hummer H2 06?

Ive tried to get the music since it has the connector built in but I cant seem to hear anything... What are the stations i need to use.|||I don't know, my daddy has one of those, though! A Hummer H2! I think you have to buy this thing that you hook up to it and then you plug in your iPod.. I don't know what it's called though.. but I look hot in it.|||Get a smaller car you gas guzzling idiot. it may work on a smaller more economic cars